Perhaps you should try some spelling variations:
sach ngang » sach nang, sach ngan, sach ngon
ngang thuy » nang thuc, dang thuy, hoang thuy
sach nganh » sach ngan, cac nganh, sach danh
sach tranh » canh tranh
thuy khi » thuy loi, thuy nha, huu khi
su sach » so sach, vu sach
y khi » ly khi, ky khi, my khi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach ngang thuy khi đong luc ) or ( su ((sach nganh) OR (sach tranh)) y khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach ngang thuy khi đong luc ) OR ( su ((sach nganh) OR (sach tranh)) y khi đong luc ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su sach ngang thuy khi đong luc ) or ( su ((sach nganh) OR (sach tranh)) y khi đong luc ))*".